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Old 19th August 2013, 04:25 PM   #141
GM is offline GM  United States
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Quote:
Originally Posted by xrk971 View Post
I think that the Karlson is one of the better designs for 'throwing' a bass/mid-bass punch in a larger outdoor area. Getting one to work at 40 Hz will require a design from the ground up.
Well, if you mean by 'throw', it has a wider pattern than a normal speaker of the same width/driver size, then yes, but 'throw' normally refers to a speaker's directivity over axial distance, which unless someone has measurements to prove otherwise is at best, no better than a basic baffle speaker of the same height/width.

Right, for a wider BW it ideally needs more series resonant couplers. Using higher aspect ratio ones should work, but HF 'ripple' may be excessive with less driver protection down low same as a TH.

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Old 16th September 2013, 01:54 PM   #142
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Just found this thread. These look great. How about modeling for the following coax tannoy's I own? Thanks in advance!

Tannoy 2046 8" Dual Concentric:

Znom: 8.000ohms
Revc: 4.400ohms
Sd: 196 cm^2
BL: 7.5253
Vas: 34.7
Cms: 635.4423 um/N
Mms: 23.2575g
Mmd: 21.6785g
Fi: 40.062Hz
Fo: 41.400Hz
Qms: 10.550
Qes: 0.470
Qts: 0.450
Pmax: 100W
Hvc: 10mm
Hag: 5mm
Xmax: 2.5mm
Cmx: 2.5mm
Cmo: 1mm
No: 0.51%
SPLo: 89.08dB
SPL 2.83V/m: 91.10
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Old 16th September 2013, 03:27 PM   #143
xrk971 is online now xrk971  United States
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Quote:
Originally Posted by tomlang View Post
Just found this thread. These look great. How about modeling for the following coax tannoy's I own? Thanks in advance!

Tannoy 2046 8" Dual Concentric:
Here is the simulation with walls really far away. The Tannoy looks pretty good - you need to scale the width and depth by 0.67X - leave the height alone.

SPL vs Freq

Click the image to open in full size.

Impedance

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Cone Excursion

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Old 17th September 2013, 05:37 PM   #144
xrk971 is online now xrk971  United States
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Kind of related to this is the RCA Fan K-slot loaded BLH speaker. I just modeled it in Akabak and posted in this thread:

FE168E or FE208E Sigma - project ideas
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Old 17th September 2013, 06:20 PM   #145
tomlang is offline tomlang  United States
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Quote:
Originally Posted by xrk971 View Post
Here is the simulation with walls really far away. The Tannoy looks pretty good - you need to scale the width and depth by 0.67X - leave the height alone.
This is scaling the "original" Karsonator, NOT the Karsonator-8, correct?
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Old 17th September 2013, 06:30 PM   #146
xrk971 is online now xrk971  United States
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Quote:
Originally Posted by tomlang View Post
This is scaling the "original" Karsonator, NOT the Karsonator-8, correct?
Yes, original (29.5 in tall x 15.25 in wide).
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Old 23rd September 2013, 09:01 PM   #147
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Hi xrk971,

In Post #146 are you showing internal dimensions? I'll attach what I have for the original Karlsonator, please, let me know if there are any errors in this drawing.

Regards,
Attached Files
File Type: pdf Karlsonator_Original.pdf (27.9 KB, 52 views)
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Old 23rd September 2013, 10:06 PM   #148
tomlang is offline tomlang  United States
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Question on scaling...the two left in black are original size. The two directly to the right in blue are scaled .67 in width and depth. Obviously, I have to do some work to get the plywood thicknesses in line.

However, does the K-slot also change shape, or should it be truncated as in the second shrink example with the black lines showing its original shape?

PS, thanks to tb46 for the .pdf. It opened directly in CAD without having to redraw it.
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File Type: jpg karlsonators.JPG (55.8 KB, 85 views)

Last edited by tomlang; 23rd September 2013 at 10:12 PM.
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Old 24th September 2013, 12:45 AM   #149
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Hi tomlang,

I'm just trying to learn a bit about the Karlson enclosures myself. But, I assume that the slot should be scaled too (your blue line drawing). From what I've been able to gather there is a lot of room for experimentation.

Good that someone is getting use out of this drawing, I was hoping to fit this project into my "spare time", but right now, there is very little of that. :-)

Regards,
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Old 24th September 2013, 02:15 AM   #150
xrk971 is online now xrk971  United States
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TB46 and Tom Lang,
The drawings look good and yes, the K slot should be scaled like in the blue drawing. Experiment with the slot - it is easy to change.
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